Siemens SINAMICS G130 Operating Instructions Manual page 17

Limiting the rate of voltage rise and the voltage peaks by means of the motor reactor and dv/dt filter
plus Voltage Peak Limiter
IGBT converter switching frequencies result in high voltage gradients (dv/dt) at the converter
output. If long motor cables are used, this leads to an additional current load on the
converter due to capacitive charge/discharge currents. The high voltage gradients, and the
resulting transients at the motor terminals, cause the motors' electrical winding load to
increase as compared with direct on-line operation.
The dv/dt filter plus Voltage Peak Limiter limits the rate of voltage rise to values < 500 V/µs
and the typical voltage peaks Û
≤ 150 m):
● < 1000 V at U
● < 1250 V at 660 V ≤ U
dV/dt filter plus Voltage Peak Limiter
Operating Instructions, 03/2012, A5E00692302A
≤ 575 V
line
6
5
4
3
2
1
0
100 200 m 300
0
Û /U
LL N
Figure 2-1 Limiting the rate of voltage rise and the voltage peaks by means of the motor reactor
and dv/dt filter plus Voltage Peak Limiter
to the following values (with motor cable lengths of
LL
≤ 690 V
line
6
5
4
3
2
1
0
100 200
0
Û /U
LL N
m 300
Û /U
LL N
General
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